---
title: looseObject
description: Creates a loose object schema.
source: /schemas/looseObject/looseObject.ts
contributors:
  - fabian-hiller
  - muningis
  - kazizi55
---

import { ApiList, Link, Property } from '~/components';
import { properties } from './properties';

# looseObject

Creates a loose object schema.

```ts
const Schema = v.looseObject<TEntries, TMessage>(entries, message);
```

## Generics

- `TEntries` <Property {...properties.TEntries} />
- `TMessage` <Property {...properties.TMessage} />

## Parameters

- `entries` <Property {...properties.entries} />
- `message` <Property {...properties.message} />

### Explanation

With `looseObject` you can validate the data type of the input and whether the content matches `entries`. If the input is not an object, you can use `message` to customize the error message.

> The difference to <Link href="../object/">`object`</Link> is that this schema includes any unknown entries in the output. In addition, this schema filters certain entries from the unknown entries for security reasons.

## Returns

- `Schema` <Property {...properties.Schema} />

## Examples

The following examples show how `looseObject` can be used. Please see the <Link href="/guides/objects/">object guide</Link> for more examples and explanations.

### Simple object schema

Schema to validate a loose object with two specific keys.

```ts
const SimpleObjectSchema = v.looseObject({
  key1: v.string(),
  key2: v.number(),
});
```

### Merge several objects

Schema that merges the entries of two object schemas.

```ts
const MergedObjectSchema = v.looseObject({
  ...ObjectSchema1.entries,
  ...ObjectSchema2.entries,
});
```

### Mark keys as optional

Schema to validate an object with partial entries.

```ts
const PartialObjectSchema = v.partial(
  v.looseObject({
    key1: v.string(),
    key2: v.number(),
  })
);
```

### Object with selected entries

Schema to validate only selected entries of a loose object.

```ts
const PickObjectSchema = v.pick(
  v.looseObject({
    key1: v.string(),
    key2: v.number(),
    key3: v.boolean(),
  }),
  ['key1', 'key3']
);
```

## Related

The following APIs can be combined with `looseObject`.

### Schemas

<ApiList
  items={[
    'any',
    'array',
    'bigint',
    'blob',
    'boolean',
    'custom',
    'date',
    'enum',
    'exactOptional',
    'file',
    'function',
    'instance',
    'intersect',
    'lazy',
    'literal',
    'looseTuple',
    'map',
    'nan',
    'never',
    'nonNullable',
    'nonNullish',
    'nonOptional',
    'null',
    'nullable',
    'nullish',
    'number',
    'object',
    'objectWithRest',
    'optional',
    'picklist',
    'promise',
    'record',
    'set',
    'strictObject',
    'strictTuple',
    'string',
    'symbol',
    'tuple',
    'tupleWithRest',
    'undefined',
    'undefinedable',
    'union',
    'unknown',
    'variant',
    'void',
  ]}
/>

### Methods

<ApiList
  items={[
    'assert',
    'config',
    'fallback',
    'forward',
    'getDefault',
    'getDefaults',
    'getFallback',
    'getFallbacks',
    'is',
    'keyof',
    'message',
    'omit',
    'parse',
    'parser',
    'partial',
    'pick',
    'pipe',
    'required',
    'safeParse',
    'safeParser',
  ]}
/>

### Actions

<ApiList
  items={[
    'check',
    'brand',
    'description',
    'entries',
    'flavor',
    'maxEntries',
    'metadata',
    'minEntries',
    'notEntries',
    'partialCheck',
    'rawCheck',
    'rawTransform',
    'readonly',
    'title',
    'transform',
  ]}
/>

### Utils

<ApiList items={['entriesFromList', 'isOfKind', 'isOfType']} />
